Question

Hexagonal close packing is found in crystal lattice of:

• A. $\text{Na}$
• B. $\text{Mg}$
• C. $\text{Al}$
• D. None of these

Answer 1

Answer: (B)

$\text{Mg}$

Co-ordination number in $HCP=12$

Co-ordination number in $Mg$ $=12$.